General science thread

Page 20 of 20« First<17181920
October 28th, 2019 at 1:06:33 AM permalink
rxwine
Member since: Oct 24, 2012
Threads: 140
Posts: 8148
SLAC National Accelerator Laboratory

Trump Doctrine-Abandon loyal ally and make pathetic excuses why they weren't worthy
November 22nd, 2019 at 1:05:33 PM permalink
odiousgambit
Member since: Oct 28, 2012
Threads: 108
Posts: 2682
It is ironic that we have been discussing this sort of thing in the Atheist Thread and now there is this breaking news. 


Looking into the topic, the discussion quickly goes to the role of RNA, a DNA precursor with modern roles in biological systems as well. Basically, it seems no scientist can create theories about the origin of life without quickly speculating about RNA being essential from the beginning. 


Quote: wikipedia page on Ribose (essential to RNA)
In November 2019, scientists reported detecting, for the first time, sugar molecules, including ribose, in meteorites, suggesting that chemical processes on asteroids can produce some fundamentally essential bio-ingredients important to life, and supporting the notion of an RNA world prior to a DNA-based origin of life on Earth, and possibly, as well, the notion of panspermia.



Quote: link
An international team has found sugars essential to life in meteorites. The new discovery adds to the growing list of biologically important compounds that have been found in meteorites, supporting the hypothesis that chemical reactions in asteroids – the parent bodies of many meteorites – can make some of life’s ingredients. If correct, meteorite bombardment on ancient Earth may have assisted the origin of life with a supply of life’s building blocks.


The team discovered ribose and other bio-essential sugars including arabinose and xylose in two different meteorites that are rich in carbon ... Ribose is a crucial component of RNA (ribonucleic acid). In much of modern life, RNA serves as a messenger molecule, copying genetic instructions from the DNA molecule (deoxyribonucleic acid) and delivering them to molecular factories within the cell called ribosomes that read the RNA to build specific proteins needed to carry out life processes.




https://www.nasa.gov/press-release/goddard/2019/sugars-in-meteorites
The light at the end of the tunnel can be a freight train coming the other way!..Fleastiff
November 23rd, 2019 at 1:50:05 AM permalink
rxwine
Member since: Oct 24, 2012
Threads: 140
Posts: 8148
https://www.sciencealert.com/physicists-claim-a-they-ve-found-even-more-evidence-of-a-new-force-of-nature
Trump Doctrine-Abandon loyal ally and make pathetic excuses why they weren't worthy
Page 20 of 20« First<17181920